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  <div id="layout-content"><div id="memcache.setcompressthreshold" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">Memcache::setCompressThreshold</h1>
  <p class="verinfo">(PECL memcache &gt;= 2.0.0)</p><p class="refpurpose"><span class="refname">Memcache::setCompressThreshold</span> &mdash; <span class="dc-title">开启大值自动压缩</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-memcache.setcompressthreshold-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>Memcache::setCompressThreshold</strong></span>(<span class="methodparam"><span class="type">int</span> <code class="parameter">$threshold</code></span>, <span class="methodparam"><span class="type">float</span> <code class="parameter">$min_savings</code><span class="initializer"> = ?</span></span>): <span class="type">bool</span></div>


  <p class="para rdfs-comment">
   <span class="function"><strong>Memcache::setCompressThreshold()</strong></span>开启对于大值的自动压缩。
   同样你也可以使用函数<span class="function"><strong>memcache_set_compress_threshold()</strong></span>。
  </p>

  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    此函数在memcache2.0.0加入。
   </p>
  </p></blockquote>
 
 </div>


 <div class="refsect1 parameters" id="refsect1-memcache.setcompressthreshold-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">threshold</code></dt>

     <dd>

      <p class="para">
      控制多大值进行自动压缩的阈值。 
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">min_saving</code></dt>

     <dd>

      <p class="para">
      指定经过压缩实际存储的值的压缩率，支持的值必须在0和1之间。默认值是0.2表示20%压缩率。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-memcache.setcompressthreshold-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-memcache.setcompressthreshold-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4376">
    <p><strong>示例 #1 <span class="function"><strong>Memcache::setCompressThreshold()</strong></span> 示例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #FF8000">/*&nbsp;OO&nbsp;API&nbsp;*/<br /><br /></span><span style="color: #0000BB">$memcache_obj&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">Memcache</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$memcache_obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">addServer</span><span style="color: #007700">(</span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$memcache_obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setCompressThreshold</span><span style="color: #007700">(</span><span style="color: #0000BB">20000</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0.2</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;procedural&nbsp;API&nbsp;*/<br /><br /></span><span style="color: #0000BB">$memcache_obj&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">memcache_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">memcache_set_compress_threshold</span><span style="color: #007700">(</span><span style="color: #0000BB">$memcache_obj</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">20000</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0.2</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


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